# RUN: not --crash llc -march=aarch64 -o /dev/null -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
# REQUIRES: aarch64-registered-target

# Undef uses are illegal for generic vregs.

---
name:            test_undef_use
liveins:
body:             |
  bb.0:
    %0:_(s32) = G_CONSTANT i32 0

    ; Test generic instruction
    ; CHECK: *** Bad machine code: Generic virtual register use cannot be undef ***
    G_STORE %0, undef %1:_(p0) :: (store (s32))

    ; Make sure this fails on a post-isel generic instruction.
    ; CHECK: *** Bad machine code: Generic virtual register use cannot be undef ***
    $x0 = COPY undef %2:_(s64)

    ; Make sure this fails with a target instruction
    ; CHECK: *** Bad machine code: Generic virtual register use cannot be undef ***
    RET_ReallyLR implicit $x0, implicit undef %3:_(s32)
...

